2019MNRAS.489.3307T

Query : 2019MNRAS.489.3307T

2019MNRAS.489.3307T - Mon. Not. R. Astron. Soc., 489, 3307-3315 (2019/November-1)

A new sample of X-ray selected Swift/SDSS faint blazars and blazar candidates.

TURRIZIANI S., FRAGA B. and GIOMMI P.

Abstract (from CDS):

Our present knowledge of the properties of blazars mostly comes from small samples of bright objects, especially regarding studies on their cosmological evolution. Statistically well-defined and completely identified samples of faint blazars are very difficult to obtain. We present a new X-ray selected sample of 62 blazars and blazar candidates reaching deep X-ray fluxes. We relied on the availability of large catalogues of astronomical objects combined with online services offering simple access to finding charts and magnitude estimates. We built the sample cross-matching X-ray sources in the Swift Serendipitous Survey in deep XRT GRB Fields catalogue with data from deep radio and optical surveys. Our sample can probe populations of sources 10 times weaker in the X-ray flux with respect to previous studies, thus allowing for a more detailed comparison between data and simulated counts. We use the sample to calculate the radio and X-ray LogN-LogS of blazars down to fluxes at least one order of magnitude fainter than previous studies. We show that, considering that our sample may be somewhat contaminated by sources other than blazars, we are in agreement with previous observational and theoretical estimations.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): radiation mechanisms: non-thermal - methods: statistical - catalogues - galaxies: active - galaxies: BL Lacertae objects: general - X-rays: galaxies

Simbad objects: 62

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Number of rows : 62
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SDSS J001253.36+324138.7 QSO 00 12 53.3706815424 +32 41 38.757226380           ~ 4 0
2 [VV2006] J005503.5+140806 QSO 00 55 03.5227428120 +14 08 06.538324524   19.96 19.70     ~ 27 1
3 SDSS J005514.69+140727.0 Bz? 00 55 14.6943922656 +14 07 27.055541964           ~ 1 0
4 SDSS J012320.40+381257.6 Bz? 01 23 20.39952 +38 12 57.6792           ~ 1 0
5 FIRST J020726.6+002234 Bz? 02 07 26.6 +00 22 34           ~ 3 1
6 SDSS J021305.71-021924.5 QSO 02 13 05.7136036344 -02 19 24.599342892           ~ 5 0
7 SDSS J021308.21-021219.9 Bz? 02 13 08.21760 -02 12 19.9476           ~ 1 0
8 SDSS J024446.59-021005.2 QSO 02 44 46.5865082136 -02 10 05.283901200           ~ 5 0
9 SDSS J033630.10+172316.2 Bz? 03 36 30.10512 +17 23 16.2708           ~ 1 0
10 SDSS J054613.48+641034.3 Bz? 05 46 13.48608 +64 10 34.3596           ~ 1 0
11 SDSS J062257.90-010922.7 Bz? 06 22 57.90288 -01 09 22.7664           ~ 1 0
12 SDSS J075144.83+310756.4 QSO 07 51 44.83176 +31 07 56.4852           ~ 2 0
13 SDSS J084803.78+133851.4 Bz? 08 48 03.78648 +13 38 51.4824           ~ 1 0
14 SDSS J084842.97+133623.5 Bz? 08 48 42.9728743560 +13 36 23.596471080           ~ 1 0
15 FIRST J085542.8+110314 rG 08 55 42.8348105376 +11 03 14.521424904           ~ 5 0
16 SDSS J090601.98+351215.7 Bz? 09 06 01.98912 +35 12 15.7140           ~ 1 0
17 FIRST J090935.7+454736 Bz? 09 09 35.82120 +45 47 35.1264           ~ 1 0
18 SDSS J090954.63+454412.2 Bz? 09 09 54.63864 +45 44 12.2460           ~ 1 0
19 2XMMi J091036.0+453715 Bz? 09 10 36.074 +45 37 15.86           ~ 2 0
20 NVSS J093045+165928 rG 09 30 45.4000028568 +16 59 29.243551956           ~ 7 1
21 FIRST J093750.9+153635 Bz? 09 37 50.9629415880 +15 36 35.841900996           ~ 2 0
22 SDSS J101433.44+430607.1 QSO 10 14 33.447 +43 06 07.10           ~ 5 0
23 [VV2006] J101609.5+433610 QSO 10 16 09.4717905000 +43 36 10.406825820   19.49 19.36     ~ 21 0
24 SDSS J101700.57+432819.6 Bz? 10 17 00.57696 +43 28 19.6068           ~ 1 0
25 7C 101426.19+434358.00 QSO 10 17 27.5292 +43 29 04.807   20.85 20.49     ~ 27 1
26 SDSS J110035.96+514812.3 Bz? 11 00 35.96208 +51 48 12.3912           ~ 1 0
27 SDSS J114449.59+595319.1 Bz? 11 44 49.59504 +59 53 19.1544           ~ 1 0
28 NVSS J115037+570743 rG 11 50 37.1875750776 +57 07 41.787509700           ~ 8 1
29 SDSS J120512.26+400658.0 QSO 12 05 12.2684475192 +40 06 58.044769740           ~ 9 0
30 NVSS J121012+395855 rG 12 10 12.73822 +39 59 03.0750           ~ 1 0
31 SDSS J123405.80+210225.8 Bz? 12 34 05.80392 +21 02 25.8576           ~ 1 0
32 SDSS J130358.95+411011.0 QSO 13 03 58.952 +41 10 11.08           ~ 5 0
33 SDSS J131216.28+620101.4 Bz? 13 12 16.2867432552 +62 01 01.381208880           ~ 1 0
34 SDSS J132333.32+404338.5 Bz? 13 23 33.32040 +40 43 38.5068           ~ 1 0
35 SDSS J132928.82+423049.5 QSO 13 29 28.8286986024 +42 30 49.549405464           ~ 6 0
36 [VV2006] J133128.8+420942 QSO 13 31 28.7959661952 +42 09 43.070130612   19.73 19.60     ~ 18 0
37 FIRST J133201.7+345902 rG 13 32 01.71250 +34 59 01.5982           ~ 1 0
38 SDSSCGB 723.3 Bz? 13 49 31.6135038000 +07 32 43.582418952           ~ 2 0
39 SDSS J141145.33+165519.7 Bz? 14 11 45.33840 +16 55 19.7688           ~ 1 0
40 SDSS J143133.14+362758.6 Bz? 14 31 33.1510038264 +36 27 58.582457244           ~ 1 0
41 NVSS J143733+274321 rG 14 37 33.7364010504 +27 43 22.205855712           ~ 4 0
42 NVSS J144021-000435 rG 14 40 21.75278 -00 04 38.8538           ~ 3 1
43 [VV2000] J144050.1+333350 BLL 14 40 50.1403474608 +33 33 50.205298176   18.52 18.35     ~ 29 0
44 SDSS J144615.56+543707.1 Bz? 14 46 15.56256 +54 37 07.1688           ~ 1 0
45 FIRST J151338.3+304812 QSO 15 13 38.3552344128 +30 48 12.423160584           ~ 2 0
46 SDSS J151526.21+442409.0 Bz? 15 15 26.21088 +44 24 09.0864           ~ 1 0
47 SDSS J153133.22+632747.3 Bz? 15 31 33.22488 +63 27 47.3796           ~ 1 0
48 SDSS J153143.49+002011.5 Bz? 15 31 43.49376 +00 20 11.5008           ~ 1 0
49 GALEX J154059.5+620458 Bz? 15 40 59.5045804704 +62 04 57.997286976   18.7   18.3   ~ 2 0
50 SDSS J155128.01+444723.0 Bz? 15 51 28.01424 +44 47 23.0208           ~ 1 0
51 87GB 165625.0+122450 Bz? 16 58 45.586 +12 20 27.73           ~ 3 1
52 SDSS J183230.54+423014.2 Bz? 18 32 31.06 +42 30 12.4           ~ 3 1
53 SDSS J213156.74+024607.2 Bz? 21 31 56.74368 +02 46 07.2228           ~ 1 0
54 SDSS J215415.68+165234.4 Bz? 21 54 15.68424 +16 52 34.4820           ~ 1 0
55 SDSS J215436.34+165312.5 Bz? 21 54 36.3472546272 +16 53 12.655800852           ~ 1 0
56 SDSS J220848.95+065222.6 QSO 22 08 48.9536297472 +06 52 22.669448664   17.9   18.3   ~ 3 0
57 SDSS J222507.55-022328.4 Bz? 22 25 07.55760 -02 23 28.4388           ~ 1 0
58 SDSS J224220.28+234654.3 Bz? 22 42 20.28696 +23 46 54.3432           ~ 1 0
59 SDSS J230410.78+035728.8 Bz? 23 04 10.78680 +03 57 28.8180           ~ 1 0
60 SDSS J232236.85+053856.8 Bz? 23 22 36.85776 +05 38 56.8392           ~ 1 0
61 SDSS J232311.01+054309.3 Bz? 23 23 11.01504 +05 43 09.3432           ~ 1 0
62 SDSS J234732.48+001701.7 Bz? 23 47 32.48736 +00 17 01.7844           ~ 1 0

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